You've just seen how to configure SCons
to compile a program from a single source file.
It's more common, of course,
that you'll need to build a program from
many input source files, not just one.
To do this, you need to put the
source files in a Python list
(enclosed in square brackets),
like so:

Notice that SCons
deduces the output program name
from the first source file specified
in the list--that is,
because the first source file was prog.c,
SCons will name the resulting program prog
(or prog.exe on a Windows system).
If you want to specify a different program name,
then (as we've seen in the previous section)
you slide the list of source files
over to the right
to make room for the output program file name.
(SCons puts the output file name to the left
of the source file names
so that the order mimics that of an
assignment statement: "program = source files".)
This makes our example: